For the same reason that possession of a musical instrument does not convey make the possessor a virtuoso. The land in competent hands not only fed the nation, it generated a surplus to feed neighboring countries and created positive cash flow due to the trade. The socialists complained that the white farmers controlled all of the best land. The poor blacks couldn't compete with what remained. The blatant falsehood of that claim is now obvious.
The Blacks employed by the White farmers were devestated too.
"For the same reason that possession of a musical instrument does not convey make the possessor a virtuoso."
Mind if I use this in the future - I like it.